EP2465776B1 - Lightning and corrosion protection arrangement in an aircraft structural component - Google Patents

Lightning and corrosion protection arrangement in an aircraft structural component Download PDF

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Publication number
EP2465776B1
EP2465776B1 EP20110193533 EP11193533A EP2465776B1 EP 2465776 B1 EP2465776 B1 EP 2465776B1 EP 20110193533 EP20110193533 EP 20110193533 EP 11193533 A EP11193533 A EP 11193533A EP 2465776 B1 EP2465776 B1 EP 2465776B1
Authority
EP
European Patent Office
Prior art keywords
lightning
metallic
corrosion protection
protection arrangement
layer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP20110193533
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2465776A3 (en
EP2465776A2 (en
Inventor
Vicente Martinez Valdegrama
José Orencio Granado Macarrilla
Alberto Lozano Sevilla
Daniel Casares Rodriguez
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Airbus Operations SL
Original Assignee
Airbus Operations SL
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Airbus Operations SL filed Critical Airbus Operations SL
Publication of EP2465776A2 publication Critical patent/EP2465776A2/en
Publication of EP2465776A3 publication Critical patent/EP2465776A3/en
Application granted granted Critical
Publication of EP2465776B1 publication Critical patent/EP2465776B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
    • B64D45/00—Aircraft indicators or protectors not otherwise provided for
    • B64D45/02—Lightning protectors; Static dischargers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B5/00—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them
    • F16B5/04—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of riveting

Definitions

  • the invention relates to a lightning and corrosion protection arrangement in an aircraft structural component and, more in particular, to a lightning and corrosion protection arrangement for a metal-to-composite joint.
  • a lightning protection is needed in the joint areas of aircrafts components made of composite material, especially CFRP (Carbon Fibre Reinforced Plastic), with another components by means of metallic fasteners and specially needed when the inner component is made of a metallic material as happens in the case of the joint areas of a wing skin with a fuel tank.
  • CFRP Carbon Fibre Reinforced Plastic
  • Patents or patent applications EP 0976 652 , EP 0976 653 , EP 1 484 245 and WO 2006/069996 in the name of the applicant disclose lightning protection arrangements in said joint areas.
  • Document WO 2010/139709 shows an antenna arranged on a metal base plate, itself arranged on a metallized outer surface of the CFRP fairing of an aircraft.
  • the metal base plate is in electric contact with the metallized layer (directly) and with a metallic ring arranged on the inside of the CFRP fairing (via fasteners) and dissipates any lightning strikes on or near the antenna. No specific dielectric layer is used.
  • One object of the present invention is to provide a lightning and corrosion protection arrangement for a metal-to-CFRP joint in an aircraft structural component that allows at the same time the dispersion of the current generated by a lightning strike in the metallic part without damaging the composite component and the protection against the corrosion between the parts.
  • Another object of the present invention is to provide a lightning and corrosion protection arrangement for a metal-to-CFRP joint in an aircraft structural component that is easy to be implemented in a large composite component.
  • a lightning and corrosion protection arrangement for a joint between an outer metallic part comprising a foot and an aircraft structural component completely or partially made of CFRP by means of a row of metallic rivets, said arrangement comprising inner and outer metallic layers and an intermediate dielectric layer, the inner metallic layer in contact with the said structural component being thinner and extending over a larger area than the outer metallic layer in contact with the metallic part, the intermediate dielectric layer extending in an area larger than the area of the foot of the metallic part by a predetermined minimum linear distance D1 between their respective edges, the outer metallic layer extending in an area larger than the area of the intermediate dielectric layer by a predetermined minimum linear distance D2 between their respective edges.
  • said inner and outer inner metallic layers are expanded copper foil grids and said intermediate dielectric layer is a fiberglass layer.
  • said predetermined minimum distance D1 is 25 mm
  • said predetermined minimum distance D2 is 50 mm
  • the density of the expanded copper foil grid inner and outer layers is comprised, respectively, between 50-100 gr/m 2 and 700-900 gr/m 2 .
  • Figure 1 shows a cross section of the joint area between a metallic part and a composite component with a lightning and corrosion protection arrangement according to this invention.
  • the lightning and corrosion protection arrangement according to the invention comprise inner and outer metallic layers 21, 25 and a dielectric layer 23 embedded between them.
  • the dielectric layer 23 prevents the corrosion that otherwise will appear in the joint area and therefore shall have an area bigger that the area of the foot 12 of the drip fence 11 in at least a linear distance D1 between its edges.
  • the outer metallic layer 25 in contact with the foot 12 of the drip fence 11 is a thick metallic layer and overlaps the dielectric layer 23 in at least a linear distance D1 between its edges.
  • the inner metallic layer 21 in contact with the wing skin 13 is a thin metallic layer and extends along an area around the drip fence 11 suitable dimensioned for the dispersion of the currents.
  • These layers 21, 23, 25 are incorporated to the wing skin laying up stage so that they can be fully integrated in the wing skin 13 in the curing stage.
  • This arrangement provides at the same time a suitable path for the dispersion of the lightning currents and the protection against the corrosion.
  • the current dispersion path is formed only by the outer metallic layer 25, then the path is formed by the overlapping outer and inner metallic layers 21, 25, and, finally, the path is formed only by the inner metallic layer 21.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Laminated Bodies (AREA)
  • Connection Of Plates (AREA)
EP20110193533 2010-12-14 2011-12-14 Lightning and corrosion protection arrangement in an aircraft structural component Not-in-force EP2465776B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ES201031838A ES2402466B1 (es) 2010-12-14 2010-12-14 Disposicion de proteccion de rayos y corrosion en un componente estructural de una aeronave.

Publications (3)

Publication Number Publication Date
EP2465776A2 EP2465776A2 (en) 2012-06-20
EP2465776A3 EP2465776A3 (en) 2013-01-16
EP2465776B1 true EP2465776B1 (en) 2014-04-09

Family

ID=45218535

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20110193533 Not-in-force EP2465776B1 (en) 2010-12-14 2011-12-14 Lightning and corrosion protection arrangement in an aircraft structural component

Country Status (4)

Country Link
US (1) US9016615B2 (zh)
EP (1) EP2465776B1 (zh)
CN (1) CN102556357B (zh)
ES (2) ES2402466B1 (zh)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9481157B2 (en) 2014-03-06 2016-11-01 The Boeing Company Repair apparatus and method for composite panels having a conductive layer
WO2016044217A1 (en) 2014-09-17 2016-03-24 Alcoa Inc. Fasteners with dual skin depth washers
US9784132B2 (en) 2015-04-20 2017-10-10 Pratt & Whitney Canada Corp. Voltage discharge channelling assembly for a gas turbine engine
US9964131B1 (en) * 2017-04-28 2018-05-08 The Boeing Company Methods and apparatuses for providing corrosion protection to joined surfaces
JP6770987B2 (ja) * 2018-03-12 2020-10-21 株式会社Ｓｕｂａｒｕ 複合材構造体、航空機及び雷電流の誘導方法
US11572195B2 (en) 2018-07-26 2023-02-07 Honeywell International Inc. Lightning-dissipative aircraft assemblies and valve frames utilized in the same

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3989984A (en) * 1975-07-11 1976-11-02 Mcdonnell Douglas Corporation Aircraft lightning protection means
US4352142A (en) * 1981-04-15 1982-09-28 The Boeing Company Composite aircraft structure having lightning protection
WO1984001487A1 (en) * 1982-09-30 1984-04-12 Boeing Co Integral lightning protection system for composite aircraft skins
US4502092A (en) * 1982-09-30 1985-02-26 The Boeing Company Integral lightning protection system for composite aircraft skins
GB9107766D0 (en) * 1991-04-12 1991-06-05 Short Brothers Plc A structural component
ES2163951B1 (es) 1998-07-29 2003-05-16 Airbus Espana Sl Un sistema de proteccion contra descargas electricas, especialmente rayos, de componentes estructurales de aviones.
ES2162718A1 (es) 1998-07-29 2002-01-01 Const Aeronauticas Sa Un sistema de proteccion contra descargas electricas, especialmente rayos, de componentes estructurales de aviones.
ES2264299B1 (es) 2003-06-06 2007-11-16 Airbus España S.L. Sistema de proteccion contra rayos para depositos de combustible fabricados en materiales compuestos de pobre conductividad electrica.
ES2279664B1 (es) 2004-12-30 2008-08-01 Airbus España S.L. Dispositivo de proteccion contra descargas electricas en aeronaves.
US7869181B2 (en) * 2006-03-29 2011-01-11 The Boeing Company Flex circuit lightning protection applique system for skin fasteners in composite structures
US8038099B2 (en) * 2008-04-30 2011-10-18 The Boeing Company Bonded metal fuselage and method for making the same
FR2932456B1 (fr) * 2008-06-17 2010-05-28 Airbus France Systeme de drainage d'un courant de foudre genere par une decharge orageuse sur un aeronef
DE102009026686A1 (de) * 2009-06-03 2010-12-23 Airbus France Anordnung zum Blitzschutz einer elektronischen Einheit

Also Published As

Publication number Publication date
ES2476043T3 (es) 2014-07-11
ES2402466R1 (es) 2013-05-07
EP2465776A3 (en) 2013-01-16
US9016615B2 (en) 2015-04-28
CN102556357A (zh) 2012-07-11
CN102556357B (zh) 2015-12-09
ES2402466A2 (es) 2013-05-03
EP2465776A2 (en) 2012-06-20
ES2402466B1 (es) 2014-03-13
US20120145825A1 (en) 2012-06-14

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